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United States Patent | 5,643,644 |
Demars | July 1, 1997 |
The invention relates to a process for producing a vacuum in an insulating glazing composed of two glass sheets (2, 3) separated by pins (4). According to the invention, one of the glass sheets includes a hole (12) which is plugged by a softened ball after the vacuum has been achieved. The invention also relates to an insulating glazing whose glass sheets are separated by pins (4) and joined at their periphery by a sealing joint.
Inventors: | Demars; Yves (Agnetz, FR) |
Assignee: | Saint Gobain Vitrage (Courbevoie, FR) |
Appl. No.: | 312761 |
Filed: | September 27, 1994 |
Sep 27, 1993[FR] | 93 11470 | |
Sep 27, 1993[FR] | 93 11471 |
Current U.S. Class: | 428/34; 52/786.1; 52/786.13; 65/58; 428/38 |
Intern'l Class: | E06B 003/66 |
Field of Search: | 65/36,43,58,42,59.1,34 428/34,38 52/171.3,172,786.1,786.13 |
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3947260 | Mar., 1976 | Salisbury | 65/58. |
3966449 | Jun., 1976 | Foster et al. | 65/43. |
3995941 | Dec., 1976 | Nagahara et al. | 65/43. |
4260406 | Apr., 1981 | Corbett et al. | 65/43. |
4277275 | Jul., 1981 | Kawamura et al. | 65/43. |
4293439 | Oct., 1981 | Corbett et al. | 252/316. |
5489321 | Feb., 1996 | Tracy et al. | 65/43. |
Foreign Patent Documents | |||
WO91/02878 | Mar., 1991 | WO. |
Collins, R. E., "Evacuated Glazing", Proc. SPIE-Int. Soc. for Optical Engineering (Opt. Mater. Technol. Energy Effic. Sol. Energy Convers. XI), vol. 1727, pp. 358-367. |